Attachment for extension-tables



'1. 0. LARSON. UTACHMENTTOR EXTENSION IABLES.

APPLICATION FILED SEPT-7, I920.

Patented May 24, 1921.

2 SHEETS-SHEET L INVENTOR JO 0. Larson,

WIIIVESSES I f 1 ATTORNEYS v1.0. mason.

ATTACHMENT FOR EXTEN SION TABLESL APPLICATION mas SEPT, 7. 1920.

W MENTOR I 7 A; Larson,

' ATTORNEYS Patented May 24 1 2 SHEETS-SHEE UNITED STATES PATENT OFFICE.

JOHN o. LARSON, or mrcnrmnn, MINNESOTA.

Specification of Letters Patent.

Patented May 24, 1921.

Application filed September 7, 1920. Serial No. 408,718.

To all whom it may concern:

Be it known that I, JOHN O..LARsoN, a

' citizen of the United States, and a resident of Litchfield, in the county of Meeker and State of Minnesota, have invented certain new and useful Improvements in Attachments for Extension-Tables, of which the following is a specification. My invention is an improvement in attachments for extension tables, and has for its object to provide an attachment of the character specified, by means. of .which extension leaves maybe added and firmly locked to the table and to each other at one side, to prevent upward, downward or lateral displacement with respect to the top and each other, and wherein the leaves are easily detached, when desired, andto add strength and rigidity to the table top.

A further object isto permit the use of a fifth leg for bracing the table top to be dispensed with. f

Further objects are to facilitate the insertion of the extension leaves, to rigidly lock each leaf to the table, and to every other added leaf, and in connection with any suitable locking device, to firmly lock the whole top of the table together.

In the drawings:

Figure 1 is a side view of an extension table showing the manner of attaching the extra leaves, 7

Fig. 2 is an enlarged section at the joint between the leaves,

Fig. 3 is a plan view, section of the attachment,

Fig. 4 is a similar view of the engaged section of the attachment,

Fig. 5 is a bottom plan view showin a single plate arrangement and a locking means,

Figs. 6 and 7 are sections on the lines 66 and 77, respectively of Fig. 5,

Fig. 8 is a perspective view of the hook.

In the present embodiment of the invention, the attachment consists of a series of plates 1 and a series of plates 2, which have means for detachably engaging each other, to lock the extra'leaves to the table and to each other.

The plate 1, whichis relatively long, is provided with a pair of alined longitudinally extending slots 1, by means of which it may be connected to the extra leaves. in a manner to be presently described, and

of the v engaging this plate is provided at one end with a longltudinally extending tongue 3, and at the other. witha transverse slot 4, adapted to be engaged by the tongueof a succeeding plate. That end of the plate 1 outside of, the slot 4 is offset outwardly and rounded, as shown at 5, and the slot4 is in the inclined portion of the plate which connects the outwardly offset portion 5 with the body of the plate. The plate 2 is relatively short, and this plate has one end outwardly offset, as shown at 6, and the plate has a transverse slot 7 inthe inclined portion which connects the outwardly offset portion with the body of the plate. The plate is also provided with openings 8, which are reamed on the outer face of the plate, and are adapted to receive a securing means for connecting the plate to the table; The plate 2 is connected to one of the sections of the table top 9, by means of screws 10, or the like, which. are passed through the slotsS and the plate is so am rangedwith respect to the top that the slot Tis just beyond the edge of the top section, as clearly shown in Fig. 2.

It will be understood that one of these plates 2 is secured to one top section at the inner edge and each extra leaf, indicated at 11, is providedwith one of the plates 1,

' of screws 12, which are passed through the slots 1*. The screws are loose enough so that the plates 1 may slide easily with respect to the extra leaves, and these plates 1 are of such length that the offset portion 5 and the tongue 3 will extend beyond the side edges of the extra leaf, as shown in Fig. 1.

Furthermore, the tongue 3 is offset laterally from the body of the plate in the same direction as the portion 5 of the plate, as clearly shown in Fig. 1. Each extra leaf is provided with one or more of the plates 1; when two plates are used, they are arranged near the ends of the leaf in such position that they will come just inside the exspect to each other.

is engaged with the plates 2 of the table top section, by tilting the leaf, as shown in Fig. 1, until the tongues 3 will pass through the slots 7 of the plates 2. When the leaf is tilted, the plates 1 will slide toward the plates 2, and when the tongues 3 are engaged with the slots 7, the extra leaf is permitted to take its normal position, resting on the extension bars. When preparingto attach a leaf to the table the plate 1 is moved along the bottom of the leafso that the tongue 3 of the same will be extended a considerable distance beyond the leaf whereby the tongue may be readily inserted through the opening 7 in the offset portion of the plate 2. If another extra leaf is to be inserted, it is engaged with those ends of the plates 1 remote from the tongues 3, that is, with the slots 4 in the same manner as the first leaf is engaged with the slots 7 of the plates 2. After all the leaves have been placed, the table top sections are pushed toward each other until the top sections engage the edges of the extra leaves, and it will be evident that the extra leaves will be locked in place, both with respect to the table top and with re- Any desired means may be provided for locking the last leaf at the right to that table top section not having platesfl, as,'for instance, the device shown in thefigures and to be described.

It will be understood that one of the devices is suflicient, although more may be used if desired. When more than one are used they are spaced at equal distances all inside the table frame, however, where they will be out of sight. WVhen one is used, it is at the center. The short member, Q'is rigidly attached to the table at one side, and the end member 1 is rigidly attached at the other side of the table, by any suitable locked to the table.

ing device which in turn is rigidly connect- The locking device comprises a hook, and this hook engages the slot 4 of the member 1. As shown the looking device consists of a hook 15 for engaging the slot of the member 1. The shank of this hook is mounted to slide in a guide 16, and that end of the shank remote from the hookis connected with one end of a lever 17 which is pivoted to the table. Means indicated at 18 is provided for holding the lever in adjusted position.

[It will be evident that when the .plate 1-2 occupies the relative position of Fig. 2, that is, when the connection between the tongue 3 and the body of the plate engages the offset plate 6, the plate 1 cannot move fartheraway from the plate 2. That is, the engagement of the tongue and slot is a locking engagement. When the extension leaves are placed with the tongues of each leaf in engagement with the slot'7 or4 of the table or preceding leaf, and the locking means is engaged withthe plate 1 of the last extensionleaf, all of theextension leaves will be locked firmlyin placein the table.

.I claim: v

The combination with a table having extension leaves, of'plates slidably secured to said leaves and having their terminal portions extended beyond the edges of the leaves, one end of each plate being formed with a tongue and the other end being formed with a transverse slot, a second plate secured to'the table and having a slot adapted for the reception of the adjacent tongues, and a locking device having a hooked portion passed through the slots in one of said plates, said locking device being carried by said table.

. JOHN o. LARSON. 

